The report was also presented to the Lakes Preservation League at its December meeting.

Rollin Township — as well as Woodstock Township — officials have been treating the invasive weed Eurasian watermilfoil for more than five years. The exotic weed has been known to choke out a lake’s ecosystem if left untreated.

The primary goal of weed management in both lakes is the control of exotic aquatic plants, the report states.

“The exotic plant species, Eurasian watermilfoil and curly leaf pondweed, should be controlled throughout (the lakes),” according to the report. “The abundance of these species should be reduced to the maximum extent possible, and efforts should be made to reduce their recovery after treatment.”